Gastroenterology Flashcards
PBC: associations
Sjogren’s, RA, systemic sclerosis, thyroid disease
PBC: features
Fatigue, pruritis, cholestasis, hyperpigmentation
PBC; Dx
AMA, raised IgM
PBC; Mx
Ursodeoxycholic acid
Achalasia; features
Dysphagia of liquids and solids
Regurgitation
Achalasia; Ix
Oesophageal manometry Barium swallow (bird's beak)
Peutz-Jeghers Sx; what?
AD condition with hamartomatous polyps in GI tract
Peutz-Jeghers; features
Hamartomatous polyps in GI tract
Pigmented lesions on lips, mouth, face, palms and soles
Obstruction
GI bleeding
Acute fatty liver of pregnancy: features
Abdo pain, n&v, headache, jaundice, hypoglycaemia
Elevated ALT
Intrahepatic cholestasis of pregnancy: features
pruritus, raised bilirubin
Intrahepatic cholestasis of pregnancy; Mx
Ursodeoxycholic acid
Weekly LFTs
Causes of C. dif infection
Clindamycin, cephalosporins and PPIs
C. dif; Mx
Po metronidazole
PO vancomycin
Antibody used in C dif
Bezlotozumab
Whipple’s disease; features
WHIPPLE Watery diarrhoea Hyperpigmentation of skin I (eye signs) Pleurisy Pericarditis LN Enteric involvement
Whipple’s disease; Biopsy
Macrophage deposition with periodic acid-Schiff granules
Sulphasalazine; SE
Rashes, oligospermia, headache, Heinz body anaemia, megoblastic anaemia, fibrosis
Mesalazine; SE
GI upset, headache, agranulocytosis, pancreatitis, interstitial nephritis
Gastrin; source
G cells in antrum of stomach
Gastrin; stimulus
Stomach distension
Vagal nerve
Peptides / amino acids
Gastrin; actions
Increases parietal cell acid secretion
Increases pepsinogen and IF secretion
Increases gastric motility
CCK; source
I cells in upper small intestine
CCK; stimulus
Partially digested proteins and triglycerides
CCK; actions
Increases pancreatic secretions
GB contraction and relaxation of sphincter of Oddi
Secretin; source
S cells in small intestine
Secretin; stimulus
Acidic chyme, fatty acids
Secretin; actions
Increases HCO3 secretion
Decreases gastric acid secretion
VIP; source
Small intestine and pancrease
VIP; action
Stimulates secretion by pancreas and intestine
Inhibits acid secretion
Somatostatin; source
D cells in pancreas and stomach
Somatostatin; action
Decreases acid and pepsin secretion
Hepatomegaly; cirrhosis
Non-tender firm liver
Hepatomegaly; malignancy
hard, irregular, liver edge
Hepatomegaly; RHF
firm, smooth, tender liver edge +/- pulsatile
Crohn’s; inducing remission
- steroid + 5-asa
- azathioprine / MTX
- Infliximab
Crohn’s; maintaining remission
- azathioprine
- MTX
- 5-asa
Carcinoid tumours: what?
Liver metastases and release serotonin into systemic circulation
Carcinoid tumours; features
Flushing, diarrhoea, bronchospasm, hypotension, RS valve disease
Carcinoid tumours; Ix;
urinary 5-HIAA
Carcinoid tumours; Mx
Somatostatin analogues - octreotide
LFTs; hepatic
ALT, AST
LFTs; biliary
GGT, ALP
HBV; vaccinated
HbSAg; negative
Anti-HbSAg; positive
Anti-HbCAg; negative
HBV; natural immunity
HbSAg; negative
Anti-HbSAg; positive
Anti-HbCAg; positive
HBV; acute infection
HbSAg; positive
Anti-HbSAg; negative
Anti-HbCAg; positive (IgM)
HBV; chronic infection
HbSAg; positive
Anti-HbSAg; negative
Anti-HbCAg; positive (IgM negative)
SBP; Dx
Paracentesis; neutrophils >250
SBP; Mx
IV cefotaxime
Bariatric surgery; referral criteria
No RF; BMI >40
RF; BMI >35
Hepatorenal syndrome: type 1
Rapid progression
Very very poor prognosis
Hepatorenal syndrome: type 2
Slowly progressive
Hepatorenal syndrome: Mx
terlipressin
What is Dubin Johnson syndrome?
Benign AR disorder resulting in hyperbilirubinaemia
Drugs inducing hepatocellular damage (10)
Paracetamol Anti-epileptics (valproate, phenytoin) MAOIs Halthane Anti-TB Statins Alcohol Amiodarone Methyldopa Nitrofurantoin
Drugs inducing cholestasis (6)
COCP Penicillins Steoids Phenothiazines Sulphonylureas Fibrates
Drugs inducing cirrhosis (3)
Methotrexate
Methyldopa
Amiodarone
Acute pancreatitis: causes
GET SMASHED Gallstones Ethanol Trauma Steroids Mumps Autoimmune Scorptio Hypertriglyceridaemia ERCP Drugs
Autoimmune hepatitis: type I
Anti-nuclear antibodies +/- anti-smooth muscle antibodies
Affects adults and children
Autoimmune hepatitis: type II
Anti-liver / kidney microsomal type 1 antibodies
Affects children
Autoimmune hepatitis: type III
Soluble liver-kidney antigen
Affects middle-aged
Angiodysplasia: associations
Aortic stenosis
Autoimmune hepatitis: associations
HLA B8 DR3
Bile acid malabsorption: investigation
SeHCAT
Bile acid malabsorption: Mx
Cholestyramine
C. dif: Management
PO vancomycin
PO fidaxomicin
PO vancomycin +/- IV metronidazole
Barrett’s oseophagus: histology
Columnar epithelium
Monitoring Rx in haematochromatosis
Ferritin and transferritin
Plummer Vinson syndrome: what?
Dysphagia, glossitis, IDA
Acute pancreatitis: severe (6)
>55 Hypocalcaemia Hyperglycaemia Hypoxia Neutrophilia Elevated LDH and AST
Child Pugh Score
Ascities Bilirubin Albumin PT Encephalopathy
Coeliac; HLA
HLA DQ2 and HLA DQ8
Crohn’s histology
Inflammation in all layers of mucosa
Increased goblet cells
Granulomas
UC histology
No inflammation beyond submucosa
Crypt abscess formation
Depletion of goblet cells
Crohn’s endoscopy
Deep ulcers
Skip lesions
Cobble stone appearance
UC endoscopy
Psudopolyps
HSM: causes
CLD with portal HTN Infections; glandular fever, malaria, hepatits Lymphoproliferative disorders Myeloproliferative disorders Amyloidosis
HRS: pathophysiology
Splanchnic vasodilation
Maltase
Maltose –> glucose + glucose
Sucrase
Sucrose –> fructose + glucose
Lactase
Lactose –> glucose and galactose
Melanosis coli
Associated with laxative abuse
UC Inducing
Rectal aminosalicylate
PO aminosalicylate
Steroid
UC Inducing in severe disease
Topical aminosalicylate and PO aminosalicylate
UC Inducing in severe colitis
IV steroids / ciclosporin
Gastric MALT lymphoma; associations
H. pylori infection
Oesophageal adenocarcinoma: RF
GORD Barrett's Smoking Achalasia Obesity